Elfje took years to build and was delivered in 2014 - while Mrs Schmidt also launched 11th Hour Racing.

That in turn is part of the 11th Hour Project, part of the Schmidt Family Foundation, which works to educate sailors and the maritime industry about how and why the ocean should be protected.

“We’ve been extremely lucky in our lives," Mrs Schmidt said in the same interview with Boat International . "You have to make a decision about what you’re going to do with that. Wealth is a responsibility, one way or another.